97851565 has 16 divisors (see below), whose sum is σ = 135182592. Its totient is φ = 66605184.

The previous prime is 97851547. The next prime is 97851581. The reversal of 97851565 is 56515879.

It is a cyclic number.

It is not a de Polignac number, because 97851565 - 2⁷ = 97851437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5409 + ... + 14998.

It is an arithmetic number, because the mean of its divisors is an integer number (8448912).

Almost surely, 2^97851565 is an apocalyptic number.

It is an amenable number.

97851565 is a deficient number, since it is larger than the sum of its proper divisors (37331027).

97851565 is a wasteful number, since it uses less digits than its factorization.

97851565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20556.

The product of its digits is 378000, while the sum is 46.

The square root of 97851565 is about 9891.9949959551. The cubic root of 97851565 is about 460.8107394380.

The spelling of 97851565 in words is "ninety-seven million, eight hundred fifty-one thousand, five hundred sixty-five".